Conversion of cubic P zeolite

S.I. Zones and R.A. Vannordstrand, Novel Zeolite Transformations - the Template-mediated Conversion of Cubic-P Zeolite to SSZ-13. Zeolites, 1988, 8, 166-174. 

The conversion of Cubic P to organozeolites is observed by following the rise in pH (measured at room temperature) (J ). X-ray diffraction was used to measure extent of conversion. Zeolite synthesis reactions were carried out at 135 C with 30 rpm tumbling in Parr 4745 reactors with Teflon cups. Unless otherwise stated, the synthesis mix consisted of 0.50 g Cubic P, 2.5 millimols quaternary ammonium halide, 5.0 g Banco "N" silicate solution (38.5% solids, Si02/Na20 = 3.22), and 12 mL water. Cubic P was prepared by reacting "N" silicate, water, Al2(SO )3, at 140 C for six... 

Conversion to Other Zeolites, A key question regards the significance of the trimethylammonium group on the template for the conversion of Cubic P. Table II contains the templates studied in this connection TMA causes conversion to the organozeolite sodalite and at a rate comparable to most of the conversions to SSZ-13 shown in Figure 2 The rates for this second portion of the study are shown in Figure 5, based on pH measurements. Products in this portion are generally of the pentasil class. Rates of the templates other than TMA and TEA were relatively slow. TEA produced mostly mordenite plus a little beta. 

Figure 6. The inhibition of Cubic P zeolite conversion to SSZ-13 when the Cubic P has been pretreated with Diquat 4. Br has no inhibitory effect.

This paper presents results of a continuation of our study (1,2) of the conversion of the small-pore zeolite. Cubic P, into various organozeolites—large-, medium-, and small-pore varieties. The main focus here is on the influence of structure of the quaternary amine template molecule on the rates of conversion and on the organo-zeolite produced. 

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